/Engine/Source/Developer/CollectionManager/Public/ICollectionManager.h
Returns a list of asset paths found in the specified collection and share type
bool GetAssetsInCollection ( [FName](API\Runtime\Core\UObject\FName) CollectionName, [ECollectionShareType::Type](API\Developer\CollectionManager\ECollectionShareType\Type) ShareType, [TArray](API\Runtime\Core\Containers\TArray)< [FSoftObjectPath](API\Runtime\CoreUObject\UObject\FSoftObjectPath) > & OutAssetPaths, [ECollectionRecursionFlags::Flags](API\Developer\CollectionManager\ECollectionRecursionFlags\Flags) RecursionMode ) const